In a bowl, soak the shrimp in buttermilk for at least 30 minutes in the refrigerator.
In a separate bowl, mix together the flour, paprika, garlic powder, onion powder, cayenne pepper, salt, and black pepper.
Remove the shrimp from the buttermilk and dredge each shrimp in the seasoned flour mixture.
Dip each floured shrimp back into the buttermilk before coating them with panko breadcrumbs.
Heat about an inch of oil in a large skillet over medium-high heat and fry the shrimp until golden brown.
In a small bowl, whisk together mayonnaise, sweet chili sauce, and sriracha.
Place a handful of shredded cabbage on each tortilla, top with fried shrimp, and drizzle with bang bang sauce.
Serve your tacos with lime wedges on the side.